Hi Philip,
thanks for the support. I installed the old kernel 5.10.152-rt75-v7 with the command you provided. And it worked. Now the errors are gone and I can communicate with the DATA IO Module. Attached you will find the kernel log from the most recent start (with linux kernel 5.10).

The kernel ...

Hello Nicolai,
here are some boot params

>cat config.txt |grep -v "^#"|awk NF
hdmi_force_hotplug=1
hdmi_drive=2
dtparam=audio=on
dtoverlay=revpi-connect
dtparam=eth0_mac_hi=0xc83ea701
dtparam=eth0_mac_lo=0x4a07
dtparam=eth1_mac_hi=0xc83ea701
dtparam=eth1_mac_lo=0x4a08

>cat cmdline.txt
dwc_otg ...

Hi,
I upgraded my 4year old Kunbus RevolutionPi Connect+ (8GB) manually from stretch to buster. And afterwards from buster to bullseye. After restarting the system I can't access the DIO Module anymore. I got the following errors (note I removed lines in between for better readability, see attached ...

Hello Mr. Baumann,
I double checked my environment. To be safe, I also rewired my wirings. I am really sure that there is a permanent connection from the power supply (24V) to the resistor (10k) to the data input signal. I got the same results as in my last test.

But I should note, that we may have ...

Just to let you know:
I physically rewired the data input to the power supply. I have restarted my testcase. But the result is the same:

$ ./checkIO-2.py
emergency stop pressed at 2020-12-03T15:59:15.128044
emergency stop pressed at 2020-12-03T15:59:21.138075
emergency stop pressed at 2020-12 ...

Hello Chris,
is the input pulled high by the supply or is it pulled high by a digital output?


Hello Mr. Baumann,
this is really an interesting question! I thought, the emergency stop was constantly connected to power supply, but I had heard now, that it is connected to a digital output. My test ...

Hello Dirk, you find my uname output in my first post in the second code block in line 2. It looks like we are using the same kernel version. Note that we cyclically update/ugrade our system. So it should be up to date.

The python code is just for testing purpose. In our real world application we ...

We are having an emergency stop button connected to an input of the Kunbus Digital IO Module connected to a Kunbus RevPi Connect+. Due to its usage the input signal of the Digital IO Module is constantly set to "1". We are cyclically reading the input (from within our C-program). Sporadically we get ...

Hallo Dirk,
vielen Dank für die vielen hilfreichen Informationen. Ich werde nun meine Logs mitschreiben und mich beim nächsten Mal mit hoffentlich ausführlichen und hilfreichen Logs melden. Das Flash zu checken werde ich auch bei nächster Gelegenheit mal durchführen. Derzeit läuft das Gerät zum ...

Hallo Forum,
ich habe einen RevolutionPi Connect+ 8GB welcher über das bei Kunbus verfügbare Hutschienen Schaltnetzteil angeschlossen ist. Erweitert wurde das Gerät mit einem DATA IO und mit einem CAN Modul.
Das System läuft seit etwa 3-4 Monaten kontinuierlich und zuverlässig durch. Es gab nur sehr ...